the rest of us mid to upper 50s. the monterey bay and inland, everybody the mid to upper 40s under a mostly clear sky. it is that sunshine and a slower breeze today that allows warming to begin. cooler air is moving off to the east. high pressure's moving in. it also will keep us clear at night with these longer nights and this dry air. it's going to be pretty comfortable. that's why this heat wave will not be too excessive or possibly even deadly or dangerous. the warm afternoons, we'll keep an eye. could cause you problems saturday, sunday, monday and to a lesser extent on tuesday. what's happening upstairs? a pretty potent system but most of that moving to the north. this cool front going to bring us a few high clouds. pushing a warmer air mass our way and we'll see temperatures jump. saratoga and campbell in the south bay at 81 degrees. on the peninsula, millbrae 73. warm all the way to 78 palo alto. mid-60s along the coast. still a little breezy today downtown, south san francisco, sausalito low 70s. 78 petaluma